So I just recently replaced my old 64GB SSd with this new Samsung one and apparently it's more or less the best one out right now, except now my PC starts in about 20-30 seconds, not 7 like it used to.
I couldn't clone the original SSD to the new one so I just fully re-installed.
Have you tryed running a benchmark to see how fast the drive is. Have a look through divice manager and see if the Sata controller is using the proper driver.
borked install, try linux perhaps just for testing
do benchmarks - asssd, tunehd etc. compare to reviews if less than by a moderate margin rma it. Even try the drive in another system. Even if you're in doubt rma it.
If your benchmark comes back and there isn't a throughput issue then it sounds like something going wrong at startup. Check your BIOS settings. Are any messages displayed at boot? For example the only 6Gbps SATA controller on my board has to do its own I/O test on startup and displays a message similar to this for 6-7 extra seconds:
Might sound odd. Have you run windows experience rating this. Windows might not know it is an SSD and is treating it like a mechanical, excessive writes and defragging.
Atto is a good one for just showing speed. And if you want to go more in depth then give HDD tune a try. I think the drive may be a bad one as you had an SSD the was fine alredy in the system with no problems.
Was messing around with a rig with two GTX 980's yesterday and then checked the price. 1k each reference cooler and that was on special. Then checked 970 and it way 850. Yeep. We get screwed over here.